Computer Science for IGCSE & O level - The Internet And Its Uses (Section 8 - No. 39)
What is the purpose of using a firewall as a security measure?
To allow all types of network traffic.
To encrypt all data passing through the network.
To prevent unauthorized access to a network.
To speed up internet browsing.
คำอธิบาย
Firewalls are designed to protect a network by filtering out unauthorized traffic.